Patent No. EP4400407 (titled "A Wing Sail") was filed by Ozone Kites on Jan 12, 2023. The application was issued on Jun 4, 2025.
Inflatable wing sail for foil boards featuring a unique strut configuration that enhances aerodynamic performance while maintaining structural integrity. The sail comprises a first inflatable strut defining the leading edge, a second inflatable strut extending from the first, and a sail sheet spanning between the struts. The sail features a handle mounted on the second strut, allowing users to control the wing's movement. The sail's design incorporates separate sail sheets for the front and rear edges, which connect to the struts and extend rearwardly to the trailing edge. This configuration enables precise control while maintaining the structural integrity of the inflatable struts.

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